Electric detonator and exploder.



R. H. RBNNIE & C. C. JESSEN. ELECTRIC DETONATOR AND EXPLODVER.

APPLICATION FILED MAY 19, 1910.

Patented Mayz, 1911.-

k fana UNTTED STATES PATENT OFFICE;

RONALD '11. BENNIE AND CHARLES C. JESSEN, 0F OAKLAND, CALIFORNIA.

ELECTRIC DETONATOR AND EXPLODEB.

Specification o! Letters Patent.

Patented May 2, 1911.

Application lcd May 19, 1910. Serial No. 682,800.

-rovemen'ts in Electric Detonators and xploders, of which the followingis a specification.

Our invention relates to that class of devices used either as detonatorsor 'exploders, in which iniiammable'or explosive materials are carried-within a container, and are ada ted to be ignited by an electriccurrent.

' container, with the rim 4 of said container T e object of ourinvention, in general terms, is to provide a device of 'thls class with'a cap or plug-closure of a stable and permanent character, hermeticallysealing 'the container and making it moisture proo permitting thei itionof the contents under liquid and t e immersion -of the device for anunlimited time Without material deterioration."

Tothis end our invention consists in the novel construction of thecontainer, its ca4 or -plug-closure-and the sealing thereof an theelectrodes which we shall now fully describe and claim.

Referring to the accompanying drawings-Figure 1 is a longitudinalsection of our device on an enlarged scale, and the parts somewhatexaggerated, for the 4sake of-illustration. Fi 2y is a cross section onthe line :vof 1g. 1. Fi .'3 is an enlarged sectional view ofthe eviceshowing.

a modified form of the initial seating of the closure-plug inthecontainer.

1 is a` metallic container having an open top. In this container isplaced whatever inflammable or explosive Amaterial may be required forits particular use las an 'exploder,.or as a detonator, and the generalsha e of the body of the container will be suoli) as will fit it forsaid uses.

2 isa plug which fits andcloses the open top of the container.V This plumay make with the container any suitab e form of frictionallyutight andshouldered initial seat or joint, t in its practical development weprefer, for 4a reason presently to be stated, the joint hereillustrated, inwhich the plug seats down to a shoulder 3 in the projecti beyond the plug. Furthermore this plug, 1n its best construction,is of metal,

lcompressing said wires; or it may be possible a li uid-proof andtightjoint with' the insulate electric wires; and, second, it provides formaking a liquid proof and hermetically sealed joint between itself andthe container, both joints being of a most permanent character.' Thefirst of -the 0bjects flows from thefact that by reason of 4the metalliccharacter of the-plug it may ^be either cast or molded upon and a outtheinsulated wires, thereby, 1n cooling, tightly 1 rectly' compressedthereon, as `we have here illustra-ted; in which the plug is shown as.provided with holes for the wires, said holes being slitted at 8 tothe(J outside,- and thereafter forced tightly closed, by pres;

sure, about the insulated wires. Such pres. sure as-this has the furtherbeneficial effect 4ofsuiiiciently shouldering the wire insulation, asshown at 9,. just above and below Vthe plug, to tightly hold the wiresand close their passages through the plug.

The secpnd object is attained by the use of a metallic plug,by thefurther develop? ment of our invention, in the shape of ame# talliccoating 10V of electro-plating deposit. This coating 1s applied afterthe container is filled and the plug', with its wires, seated well inplace. It covers the upper portion part ofthe container as far down asmay be desired, and laps over the projecting 4 of the container, anddownits nlnet-'surface and over the entire upper-'surface of the plugand around the entrances thereto of the insulated wires, thus forming acomplete liquid tight and or the fitted parts, an in lace.

s .we have before stated the form which the plug finds' initially in thecontainer may be of any suitable charact'e Thus in Fig. 3 we show a-formin' -which the plug seats agiinst the top rim of the container b a J ofthe ug rojects beyond the rim. In this case, .t e e cetro-platingdeposit 10 envers (permanent envelop holding the plug of seat s oulderat 11 and the head 1%-4 closing the open the joint and envelops thewhole" pro'ecting head of said plug, with a similar e ect to thatheretofore described.

We may also state that in sofar as the electro-plating deposit and itsfunction are concerned, it would not be essential that theI plu bewholly of metal, for the plating mig t be accomplished by having theouter o r exposed surface of the plug only, of such a nature, that themetallic coating may be deposited by electrolysis.

Having thus described our invention what We claim as new and desire tosecure by Letters Patent is- J 1. A device of the described class,comprising an open-top container to carry an inflammable or explosivematerial; a plug closin the open top of the container; an elect-rlcalconductor passing through the plug and carrying an igniter within thecontainer; and a metallicv deposit covering and hermetically sealing thejoint between the container and plug. i

2. A device of the described class, comprising an open-top containerto-carry an inflammable or explosive material; a plug top of thecontainer; an electrical conductor passing through the plug and carryingan igniter within the container; and a metallic deposit covering andhermetically sealing the joint between the contalner and plug, andsealing also the-entrance of' the electrical conductor to said Plugl 3.A device of the described class comprising an open-top metalliccontainer to carry the inflammable or explosive material; a metallicplug closing the open top of the container.; an insulated electricalconductor passing through said plug and carrying an 7 ilgniter withinthe container; and a metallic posit of electro-plating envelopin theexterior of the container and expose surface container having aninternal shoulder below said top; a metallic plug seated within the opentop of the contalner against the shoulder therein, the rim of thecontainer extending 'beyond the plug; an insulated electrical `conductorpassing through said plug and carrying an igniter Within the container;and a metallic deposit of electro-plating enveloping the exterior of thecontainer and exposed surface of the plug, to hermetically seal and forma liquid proof closure for said container.

5. A device of the described class, comprising an open-top container tocarry an inflammable or explosive material; an electrical conductorpassing into the container and carrying an lgniter therein; insulationabout said conductor; a metallic plug tightly compressed ab'out saidinsulation and seated in the open top of the container to close it; anda metallic electroplating deposit on the container and exposed surfaceof theplug to hermetically seal the joint.

In testimony whereof we have signed our names to this specification vinthe presence of two subscribing witnesses.

RONALD H. RENNIE.

CHARLES e. JESSEN.

Witnesses:

WM. F. Boom, D.'B. RICHARDS.

